Neuroanatomy Exam 2 - Touch Pathways 2

What information does the TTT carry?

light discriminative touch, pressure, and vibration from the face

True/False
Proprioception from the face is not apart of the TTT.

true

Where does the 1st neuron begin?

receptor from the face

Where is the cell body of the 1st neuron located?

cell body in trigeminal ganglion

Where does the 1st neuron synapse?

synapse in the main sensory nucleus of CN 5

Where is the sensory nucleus of CN 5 located?

pons

Where is the cell body of the 2nd neuron located?

main sensory nucleus of CN 5

Where does the 2nd neuron cross?

cross midline in pons

Where does the 2nd neuron ascend?

ascend in contralateral trigeminal lemniscus

Where does the 2nd neuron synapse?

synapse in VPM in thalamus

Where is the cell body of the 3rd neuron located?

cell body in VPM

Where does the 3rd neuron pass through and therefore project to?

- passes through internal capsule
- projects to primary somatosensory cortex post central gyrus

If the lesion is inside the spinal cord, what will the symptoms manifest as?

symptoms at that level and below

If the lesion is in the dorsal root, what will the symptoms manifest as?

symptoms at that level